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Reform torta — walnut layers with cooked chocolate-yolk butter cream
Reform torta is a walnut-and-chocolate celebration cake with a deliberately concentrated structure. The layers are built from whipped egg whites, sugar and ground walnuts, while the filling combines cooked yolks, chocolate and butter. There is no need for a tall sponge or a light whipped-cream finish; the appeal is in thin nut-rich layers and a smooth dark filling that becomes firm enough to slice after chilling.
This version bakes one large walnut sheet and cuts it into three equal rectangles. That avoids the timing variability of baking three separate layers and makes thickness easier to control. The egg whites must first hold firm, glossy peaks. Ground walnuts and a small quantity of flour are then folded rather than beaten in. The foam will lose some volume under the weight of the nuts, but aggressive mixing removes too much air and produces a heavy, compact layer.
The sheet is baked at 180 °C until set and lightly browned, then cooled completely before cutting. Warm walnut layers are fragile and can tear when moved. Full cooling also matters for the filling: a butter-rich cream spread over warm cake would soften, slide and soak irregularly into the layer. The cleanest workflow is therefore to bake first, cool the entire sheet, and cook the filling while that cooling takes place.
The yolk mixture is the most technically sensitive part. Traditional descriptions often rely on steam cooking until the yolks become thick. Here, pasteurized yolks are cooked gently over steam to 71 °C while being whisked, which gives a measurable safety control without changing the cake’s fundamental character. Chocolate is melted into the hot yolk base, but butter waits until the mixture has cooled to room temperature. Similar temperatures are crucial for a stable emulsion.
Once assembled, the cake needs a long chill. The butter firms, the chocolate filling settles, and the walnut layers become easier to cut without squeezing cream out of the sides. Serve narrow slices; the cake is dense, nutty and rich. Ten minutes out of the refrigerator is enough to soften the cream slightly while keeping the layers clean and distinct.